Dust cap and quick adjustable nut



June 7, 1932.

R. DYMOCK DUST CAP AND QUICK ADJUSTABLE NUT Filed Feb, 14, 1929 ATTORNEY Patented June 7, 1932 UNITED STATES PATENT oF c RAYMOND DYMOCK, OF HAMBURG, NEW JERSEY, ASSIGNOR OF ONE-HALF T CARL J". MEHLER, OF SHARON, PENNSYLVANIA DUST GAP AND QUICK ADJUSTABLE NUT Application filed February 14, 1929. Serial No. 339,763.

This invention relates to new and useful improvements in dust caps and quick ad ustable nuts to be employed especially in connection with the valve stem of pneumatic tires, and has for its object to provide a com bined and cooperating device of a dust cap and nut, interengaged when in locked position, as one of the members comprising the device depends upon the simultaneous action of the other in order to secure the desired result during operation.

Another object of my device is to provide a threaclless dust and valve cap adapted to be adjusted and mounted upon a threaded stem without any screwing action, simply by slipping the said dust cap over the cooperating nut in a manner as will be hereinafter more fully described.

A distinct advantage resides in the fact,

that the said device will prove strong and durable in use and as the construction is com paratively sim le the cost of manufacturing should be relatlvely low.

As the said contrivance is very easily manipulated and a great time saving device,

it is thought, that it eventually may have a wide sco e of application, and thus be used on all vehicles, where dust caps and nuts are employed.

With the above and other objects in view, this invention consists of the novel features of construction, combination and arrangements of parts, hereinafter fully described, claimed and illustrated in the accompanying drawing forming parts of this specification, and in which similar characters of reference indicate corresponding parts in all views, and in which;

Figure 1 is a side elevation of my device mounted on a valve stem with the two major parts, or members, of my said device interlocked; Fig. 2 is a transverse sectional view of the dust cap alone; Fig. 3 illustrates the adjustable nut mounted upon a valve stem ready to receive the dust cap; Fig. 4 shows the said nut in semicollapsed position ready for quick adjustment; Fig. 5 is a top plan view of said nut, and Fig. 6 a bottom plan view thereof, while Fig. 7 is a transverse sectional view of the device as seen in Fig. 1.

the dust cap is applied to the latter.

Referring more particularly to the drawing the description of the two major parts is taken up somewhat separately for the sake of cle'arness. Thus 10 refers to my device en'- semble; 11 indicates a substantially cylindrical dust cap with a somewhat enlarged bottom part 12 adapted to receive and enclose the upper portion or flange 13 of the adjustable nut 14, when the latter, as indicated in Fig. 3, is in position for engagement with the 7 said cap 11. The dust cap has at its lower section disposed a closure element of the shape indicated by 15. This element is slidable piston-wise in the cylindrical dust cap casing, which casing is open at 29 to permit of the escape of air above the closure element. The closure element 15 is recessed and within this recess is positioned a rubber washer 16 adapted to seal the mouth '17 of the valve stem 18, when the said dust cap 11 is locked in position over the nut 14. In the said dust cap is disposed a spring 19 for the purpose of keeping the closure element in proper position and the rubber washer in close engagement with the mouth of the valve stem, when 7 At the base of the dust cap are two op ositely disposed pins 2020'for the purpose of engaging the flange 13 of the nut, and when the dust cap is pressed down over the said nut these pins pass downward through the slots 21 and, by a twisting movement are slid under the flange 13 thus locking the whole in operative position." The nut 14 is composed of a pair of hinged sections 22,22, adapted to permit one end of the nut to move laterally with respect to the stem in order to provide for the free longitudinal movement of the said nut'upon the stem when desired; a section of the inner portion of each of the nut members, are provided with threads for engaging the stem, which is correspondingly threaded-inorder to permit a tightening of the nut thereupon in the usual manner; the j situations thus described are clearly illustrated in Figs. 3 and 4. By providing a nut of this character it will be apparent that considerable time may be saved in arranging the nut in proper position upon the stem by avoiding the necessity of threading the nut "1'00 7 throughout the entire length of the said system. The nut is preferably of hexagonal form as seen at 24. The lower edge of each of the sections 22, 22 have their split edges disposed in overlapping relation, as shown at 25, with the overlapped portion of each section provided with an aligned opening through which a hinge pin 26, indicated by dotted lines, is inserted.

The bore of the nut is somewhat tapered Y in an upward direction, as shown at 27, with only its upper part threaded and with two vertically and oppositely disposed slots 21, 21, formed by cut away sections upon the upper edge portions of each of the members 22, 22. 1

In practical operation of the device the sections 22, 22 of the nut 14 are opened, as illustrated in Fig. 4, by a pressure upon the opposite sides of the lower portion of the two nut-members 22, 22 in order to permit the free longitudinal movement of the sections upon the stem. When the nut thus has been moved upon the stem up to the desired point the sections 22, 22 of the nut are moved toward each other into their comparatively closed position, as shown in Fig. 3, whereupon the dust cap 11 is applied and attached to the said nut in the manner as hereinbefore described.

It is obvious that changes may be made in the form, construction and arrangement of the several parts, as shown, within the scope of the appended claim, without departing from the spirit of the invention, and I do not therefore limit myself to the construction and arrangement shown and described herein.

What I claim as new, and desire to secure by Letters Patent of the United States, is.

A device of the class described, comprising a double deck collapsible nut, consisting of two substantially congruent halves, the upper deck having a smaller circumference than the lower, intermediate sleeve members integrally connecting said deck portions, re-

spectively, the said upper deck and sleeve portions being formed with facing reduced parts forming a channel therebetween, the lower deck portions being hinged together by means of overlapping sections, pins for securing the latter pivotally together, threads formed upon the inner sides of said upper deck and sleeve portions, the lower deck portions being formed upon their inner sides with outwardly beveled surfaces extending to the bottom thereof, substantially as shown and described.

Signed at New York city, in the county of New York and State of New York this 21st day of January,A. D. 1929.

RAYMOND DYMOCK. 

